Solving the regeneration problem for carbon nanotube based chemical weapons detectors

Chang Young Lee, Richard I. Mosel, Keith Cadwallader, Mark A. Shannon, Michael S. Strano

Research output: Contribution to conferencePaperpeer-review


We have developed a novel method to remove irreversibly-binding gas molecules from the surface of carbon nanotube gas sensors. Our approach is based upon an analyte-specific surface reaction which decomposes adsorbed analyte molecules. Therefore, it is expected to be applicable not only to carbon nanotube gas sensors but to any type of sorption-based sensors. Extreme reactivity and instability of nerve agents makes our method to be particularly useful for the regeneration of nerve agent detectors. In our work, two kinds of irreversibly-binding nerve agent precursors have been delivered to the dielectrophoretically-deposited nanotube gas sensor array showing a fast response to a small amount of analyte gas followed by a rapid regeneration of the sensor signal. Both electrical transport measurement and Raman spectroscopy are performed to characterize the sensor array and understand the regeneration mechanism.

Original languageEnglish (US)
Number of pages1
StatePublished - Dec 1 2005
Externally publishedYes
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005


Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Country/TerritoryUnited States
CityCincinnati, OH

ASJC Scopus subject areas

  • Engineering(all)


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